#include<stdio.h>
#include<stdlib.h>
typedef struct listnode {
	int data;
	struct listnode* next;
}sl;
void insertnode(sl** head, int value)
{
	sl* newnode = (sl*)malloc(sizeof(sl));
	newnode->next = *head;
	*head = newnode;
}
int main()
{

	*head = NULL;
	return 0;
}